Boardview for the Acer Swift SF315-52 notebook, with ER5EA in the name, which appears to be a board or project code, though its meaning is not stated. Supplied as a 4.87 MB .cad file, a format readable by viewers such as FlexBV, Boardviewer and OpenBoardView-compatible tools. Use it to identify parts by designator, trace nets between connectors and chips, and pick measurement points when isolating a shorted rail. Confirm the board marking printed on the PCB corresponds to this layout first.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @boardviews. Enginerys does not host this file.
How to open a .cad file
GenCAD text export, the usual format for Compal, Quanta, Wistron and Dell / HP / Lenovo laptop boards.